<template>
    <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>权限管理</el-breadcrumb-item>
    <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
     <el-card>
        <!-- 角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
             <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1===0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                         <el-col :span="5">
                         <el-tag closable @close="romoveRightById(scope.row,item1.id)">
                            {{ item1.authName }}
                         </el-tag>
                         <i class="el-icon-caret-right"></i>
                         </el-col>
                        <!-- 渲染二级三级权限 -->
                         <el-col :span="19">
                            <!-- 通过for循环渲染二级权限 -->
                            <el-row :class="[i2===0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag closable type="success"  @close="romoveRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag closable type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" @close="romoveRightById(scope.row,item3.id)">
                                        {{ item3.authName }}
                                    </el-tag>
                                </el-col>
                            </el-row>
                         </el-col>
                    </el-row>
                </template>
             </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleName"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>

        </el-table>
     </el-card>
     <!-- 展示分配权限的对话框 -->
      <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
     <!-- 树形控件o -->
    <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
    </span>
    </el-dialog>
    </div>
</template>

<script>
    export default {
        data(){
            return{
                //所有角色列表数据
                rolelist:[],
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible:false,
                rightsList:[],
                //树形控件的属性绑定对象
                treeProps:{
                    label:'authName',
                    children:'children'
                },
                // 默认选定的节点id值数组
                defKeys:[],
                //当前即将分配权限的角色id
                roleId:''

            }
        },
        created(){
            this.getRolesList()
        },
        methods:{
        // 获取所有角色的列表
        async getRolesList(){
            const {data:res}=await this.$http.get('roles')
            if(res.meta.status!==200){
                return this.$message.error('获取角色列表失败！')
            }
            this.rolelist=res.data
        },
        async romoveRightById(role,rightId){
            //弹出提示是否要删除
            const confirmResult= await this.$confirm(
                '此操作将永久删除该文件，是否继续？','提示',{
                    confirmButtonText:'确定',
                    cancelButtonText:'取消',
                    type:'warning'
                }).catch(err=>err)
                if(confirmResult !== 'confirm'){
                    return this.$message.info('取消了删除')
                }
                const {data:res}=await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if(res.meta.status!==200){
                    return this.$message.error('删除权限失败！')
                }
                role.children=res.data
        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            // 获取所有权限的数据
            const {data:res}=await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败！')
            }
            //把获取道德权限数据进行保存
            this.rightsList=res.data
            //递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true
        },
        //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node,arr){
            if(!node.children){
            return arr.push(node.id)
            }
        node.children.forEach(item=>this.getLeafKeys(item,arr))
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击为角色分配权限
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr=keys.join(',')
            const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status!==200){
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible=false


        }

        }
        
    }
</script>

<style lang="less" scoped>
.el-tag{
margin:7px;
}
.bdtop{
border-top: 1px solid #eee;
}
.bdbottom{
border-bottom:1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>